Optimus SYSTEM 747 User Manual download pdf (Page 6)

Warning: To prevent electric shock,

the power cord plug’s blades are po-

larized and fit a polarized AC outlet

only one way. If you have difficulty in-

serting the plug, do not force it. Turn it

over and reinsert it.

USING HEADPHONES

You can use headphones (not sup-

plied) to listen in privacy. Insert the

headphones’

-inch (3.5 mm) plug

into the

jack.

Notes:

• Your local RadioShack store sells

a wide selection of headphones.

• Connecting headphones automat-

ically disconnects the speakers.

Listening Safely

To protect your hearing, follow these

guidelines when you use headphones.

• Do not listen at extremely high

volume levels. Extended high-

volume listening can lead to per-

manent hearing loss.

• Set the volume to the lowest set-

ting before you begin listening. Af-

ter you begin listening, adjust the

volume to a comfortable level.

• Once you set the volume, do not

increase it. Over time, your ears

adapt to the volume level, so a

volume level that does not cause

discomfort might still damage your

hearing.

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Optimus SYSTEM 747 User Manual Page 6